CVE-2026-63077

CRITICALCVSS 9.8Known Exploited

CISA Known Exploited Vulnerability

https://blog.jetbrains.com/teamcity/2026/07/cve-2026-63077/; https://www.jetbrains.com/privacy-security/issues-fixed/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-63077

Remediation deadline: August 8, 2026

Description

JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.

Timeline

Published:July 27th, 2026 5:16 PM

Last modified:July 28th, 2026 4:17 PM

Added to KEV:August 5th, 2026

CVSS Scoring

CVSS v3: 9.8 (CRITICAL)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-502

References & Reports

Advisories, patches, and third-party reports

https://www.jetbrains.com/privacy-security/issues-fixed/

Source: NIST NVD · Data may lag official sources by up to one minute